Home / 12,185.66-18,275.78-3,421.46

Finding the Fourth Proportional to 12,185.66, 18,275.78 and 3,421.46

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Solution

The fourth proportional to 12,185.66, 18,275.78 and 3,421.46 is: 5,131.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.66 : 18,275.78 = 3,421.46 : x
  2. Step 2: Convert to fraction form
    12,185.66/18,275.78 = 3,421.46/x
  3. Step 3: Cross multiply
    12,185.66x = 18,275.78 × 3,421.46
  4. Step 4: Simplify right side
    12,185.66x = 62,529,850.24
  5. Step 5: Solve for x
    x = 62,529,850.24/12,185.66
  6. Step 6: Final answer
    x = 5,131.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.